Across
- 5. a conical volcano built up by many layers of hardened lava and tephra.
- 6. The innermost part of the earth
- 7. extremely hot liquid and semi-liquid rock located under Earth's surface
- 9. places where plates slide sideways past each other
- 10. an area on Earth where two or more lithospheric plates collide
- 12. a seafloor mountain system formed by plate tectonics
- 13. the location on the surface of the Earth directly above where the earthquake starts
- 14. when an oceanic plate runs into a continental plate and slides beneath it.
- 15. When magma flows or erupts onto Earth's surface, it is called lava
- 16. a volcano that produces low viscosity, runny lava, it spreads far from the source and forms a volcano with gentle slopes
- 18. an area where the earth's crust is splitting apart.
Down
- 1. the mostly solid bulk of Earths interior
- 2. instruments used to record the motion of the ground during an earthquake
- 3. the movement of particles through a substance, transporting their heat energy from hotter areas to cooler areas
- 4. a steep conical hill of loose pyroclastic fragments
- 7. an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma.
- 8. measure of the magnitude of an earthquake
- 9. long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
- 11. a boundary formed when two tectonic plates move away from each other.
- 17. a fracture or zone of fractures between two blocks of rock.